Disc drive might be broken. I know some games (such as SSBB and Metroid: Other M) have special discs called "Dual-layer discs" that essentially need a perfectly clean disc drive to read them. I think Xenoblade might be one of these, as the game is apparently very big. You have two options: Buy a disc cleaning kit for about $35, or send your wii in to nintendo to get the drive fixed. Option 2 is free (if you haven't sent it in before) but runs the risk of losing all your save data. Be sure to back all of it up if you send it in.
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So just got home from buying Xenoblades Chronicles and no matter what i do i can't get it to read the damn thing it's brand frikken new from Gamesto 
p what the hell nintendo anyone know how to fix the damn thing * 
don't say return it going to do that next chance i get* so untill then i shall rage i will rage hard and strong with more fury then 1,000,000 tiny trembling dogs *you know the one 
*
